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 ###Instrução: Qual é o número de serviço do trem Jammu Duronto?
 ###Tabelas: CREATE TABLE installed_capacity (installed_capacity_id AUTO_INCREMENT PRIMARY KEY, Stage VARCHAR, Unit Number INT, Installed Capacity ( MW ) VARCHAR, Date of Commissioning VARCHAR, Status VARCHAR, TG set Provider VARCHAR, Boiler Provider VARCHAR) CREATE TABLE popularity_of_terrestrial_tv_stations (popularity_of_terrestrial_tv_stations_id AUTO_INCREMENT PRIMARY KEY, TV Station (Operator) VARCHAR, 2005 INT, 2006 INT, 2007 INT, 2008 INT, 2009 INT, 2010 INT, 2011 1H INT) CREATE TABLE list_of_duronto_express_trains (list_of_duronto_express_trains_id AUTO_INCREMENT PRIMARY KEY, Service INT, Train number INT, Train name VARCHAR, Source VARCHAR, Departure VARCHAR, Destination VARCHAR, Arrival VARCHAR) CREATE TABLE meistriliiga_clubs_2013 (meistriliiga_clubs_2013_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Position in 2012 VARCHAR, First season in top division INT, Number of seasons in Meistriliiga INT, First season of current spell in top division INT, Top division titles INT) CREATE TABLE games_for_zrinjski_in_european_competitions (games_for_zrinjski_in_european_competitions_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Venue VARCHAR, Opponent VARCHAR, Score VARCHAR, Scorers VARCHAR, Competition VARCHAR)  
SELECT MAX Service FROM list_of_duronto_express_trains WHERE Train name = Jammu Duronto